I used a "Test Catalog.lrdat" to try to correct some collection error.
Fortunately this was successful.
I would like to change the name of the catalog, including the backups, but recent problems make me uneasy. Is this as simple as "changing the name of all copies including original and backups?
I am on iMac and 10.10.5 using LR 2015.3.
Using Finder, rename the .LRCAT file to your desired name.
Then rename the "preview" folder using the same naming convention (your catalog name + " previews.lrdata").
There is no need to rename the backups as long as you remember that you changed the file name if you even need to do a restore.
After you rename the catalog, you will need to manually point LR to the catalog you want to use since it won't find the one with the old name.
thanks very much. that is correct.